This is not a big bang rewrite. All the technology here is stuff that's been built over the last decade. Haste is a decade old, React is 8 years old, GraphQL is

This is not a big bang rewrite. All the technology here is stuff that's been built over the last decade. Haste is a decade old, React is 8 years old, GraphQL is around 7 years, Relay must by 5 years old by this stage. This is simply bringing them all together.